SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Impacts of hydrological processes on stream temperature in a cold region watershed based on the SWAT equilibrium temperature model 
Authors:Du, X., G. Goss and M. Faramarzi 
Volume (Issue):12(4) 
Article ID:1112 
URL (non-DOI journals): 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:stream and/or soil temperature assessment 
Secondary Application Category:hydrologic assessment 
Watershed Description:1,238 km^2 Elbow River, located in southern Alberta, Canada. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Variance in stream temperature from historical norms, which reflects the impacts from both hydrological and meteorological factors, is a significant indicator of the stream ecosystem health. Therefore, it is imperative to study the hydrological processes controlling stream temperature in the watershed. The impacts of hydrological processes on stream temperature in the cold region of Western Canada were investigated based on the previously developed Soil and Water Assessment Tool (SWAT) equilibrium temperature model. The model was calibrated and validated for streamflow and stream temperature based on the observations and a global parameter sensitivity analysis conducted to identify the most important hydrological process governing the stream temperature dynamics. The precipitation and air temperature lapse rates were found to be the most sensitive parameters controlling the stream temperature, followed by the parameters regulating the processes of soil water dynamics, surface runoff, and channel routing. Our analysis showed an inverse relationship between streamflow volume and stream temperature, and different runoff components have different impacts on temporal regimes of stream temperatures. This study elaborates on the response of the stream temperature to changes in hydrological processes at the watershed scale and indicates that hydrological processes should be taken into account for prediction of stream temperatures. 
Keywords:parameter sensitivity analysis; heat transfer; climate change; runoff composition